Ros says the refugees have seen things no one should see.
"We cannot change what has happened but we can make it easier for them. Let's show the world our love."
Stratford High School is running a 20-hour Survivor Sleepover.
"Students stay over at school for 20 hours and gain a bit of understanding about what living in a refugee camp might be like. We will make huts out of cardboard and tarps. We cook some African-style food and play games and watch movies."
Student from Stratford High School Ashleigh Stanners has participated in the 40 Hour Famine in Year 10 and again this year. In year 10, she gave up her phone.
"For the first couple hours it was hard but it was easier after the five-hour mark."
This year, Ashleigh will be attending the Survivor's Sleepover.
"There are so many people less fortunate then us. We don't know what it is like here in New Zealand. By participating in the 40 Hour Famine, we get a small understanding of what they go through by putting ourselves through something. It's a good cause, there are a lot of people our age who are struggling."
Angelina Cullen, another year 13 student, is giving up food in this year's 40 Hour Famine.
"I gave up food in Year 10 for 20 hours. This year, I am hoping to give food up for the full 40 hours. We don't know what it is like until we go without."
Ashleigh and Angelina are asking for donations.
■ For updates, announcements, news and events, follow 40 Hour Famine on Facebook and Instagram. To donate, sponsor one of the students taking part in the 40 Hour Famine or visit www.worldvision.org.nz